745
FNCA52 TJSJ 090730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST WED SEP 9 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-092000-
SOUTHEAST COASTAL PLAINS-
330 AM AST WED SEP 9 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 50 40 50
TEMP (24H TREND) 92 (+2) 75 (-2) 90
RH % (24H TREND) 55 (-8) 94 (+6) 61
WIND 20FT/EARLY(MPH) E 17 E 13 E 17
WIND 20FT/LATE(MPH) E 17 E 13 E 18
MIXING HGT(FT-AGL/MSL)5430 5060
TRANSPORT WND (MPH) E 21 E 22
VENT RATE (KT-FT) 97740 96140
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-092000-
SOUTHERN HILLS-
330 AM AST WED SEP 9 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 40 30 40
TEMP (24H TREND) 90 (+4) 72 (-3) 88
RH % (24H TREND) 60 (-6) 99 (+7) 66
WIND 20FT/EARLY(MPH) E 16 E 14 E 16
WIND 20FT/LATE(MPH) E 14 E 16 E 14
MIXING HGT(FT-AGL/MSL)5840 5740
TRANSPORT WND (MPH) E 20 E 22
VENT RATE (KT-FT) 99280 109060
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-092000-
NORTH COASTAL PLAINS-
330 AM AST WED SEP 9 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 50 30 60
TEMP (24H TREND) 92 (+3) 76 (-1) 89
RH % (24H TREND) 61 (-9) 98 (+5) 68
WIND 20FT/EARLY(MPH) E 16 E 20 E 14
WIND 20FT/LATE(MPH) E 20 E 17 E 19
MIXING HGT(FT-AGL/MSL)5590 5680
TRANSPORT WND (MPH) E 20 E 21
VENT RATE (KT-FT) 95030 102240
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-092000-
NORTHERN HILLS-
330 AM AST WED SEP 9 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 60 10 60
TEMP (24H TREND) 91 (+3) 73 (-2) 88
RH % (24H TREND) 62 (-7) 99 (+3) 69
WIND 20FT/EARLY(MPH) E 13 E 18 E 13
WIND 20FT/LATE(MPH) E 19 E 14 E 17
MIXING HGT(FT-AGL/MSL)6630 6820
TRANSPORT WND (MPH) E 17 SE 18
VENT RATE (KT-FT) 99450 109120
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-092000-
WEST COAST-
330 AM AST WED SEP 9 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS NONE TSTMS
CHANCE PRECIP (%) 50 0 50
TEMP (24H TREND) 92 (+1) 74 (-1) 91
RH % (24H TREND) 63 (-4) 99 (+4) 67
WIND 20FT/EARLY(MPH) E 16 E 18 E 16
WIND 20FT/LATE(MPH) E 16 E 18 SE 17
MIXING HGT(FT-AGL/MSL)5080 5140
TRANSPORT WND (MPH) E 15 E 17
VENT RATE (KT-FT) 66040 77100
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-092000-
EASTERN INTERIOR-
330 AM AST WED SEP 9 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 50 60 60
TEMP (24H TREND) 91 (+4) 73 (-3) 88
RH % (24H TREND) 60 (-6) 99 (+5) 69
WIND 20FT/EARLY(MPH) E 17 E 16 E 17
WIND 20FT/LATE(MPH) E 16 E 17 E 16
MIXING HGT(FT-AGL/MSL)5940 5810
TRANSPORT WND (MPH) E 21 SE 22
VENT RATE (KT-FT) 106920 110390
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-092000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST WED SEP 9 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 60 70 70
TEMP (24H TREND) 86 (+4) 71 (-3) 85
RH % (24H TREND) 66 (-8) 100 (+3) 73
WIND 20FT/EARLY(MPH) E 14 E 12 E 14
WIND 20FT/LATE(MPH) E 14 E 13 E 13
MIXING HGT(FT-AGL/MSL)4920 4240
TRANSPORT WND (MPH) E 22 E 23
VENT RATE (KT-FT) 93480 84800
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-092000-
CENTRAL MOUNTAIN RANGE-
330 AM AST WED SEP 9 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 60 0 60
TEMP (24H TREND) 88 (+5) 70 (-2) 86
RH % (24H TREND) 65 (-7) 100 (+4) 71
WIND 20FT/EARLY(MPH) E 11 E 14 E 12
WIND 20FT/LATE(MPH) E 11 E 12 SE 12
MIXING HGT(FT-AGL/MSL)7370 6950
TRANSPORT WND (MPH) E 15 SE 18
VENT RATE (KT-FT) 95810 111200
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-092000-
CAYEY MOUNTAIN RANGE-
330 AM AST WED SEP 9 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 60 60 60
TEMP (24H TREND) 86 (+3) 71 (-3) 84
RH % (24H TREND) 67 (-3) 100 (+3) 74
WIND 20FT/EARLY(MPH) E 13 E 11 E 13
WIND 20FT/LATE(MPH) E 13 E 12 E 13
MIXING HGT(FT-AGL/MSL)5360 4710
TRANSPORT WND (MPH) E 21 E 23
VENT RATE (KT-FT) 96480 94200
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-092000-
VIEQUES-
330 AM AST WED SEP 9 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 60 60 60
TEMP (24H TREND) 91 (+2) 78 (-3) 90
RH % (24H TREND) 58 (-4) 89 (+4) 59
WIND 20FT/EARLY(MPH) E 19 E 20 E 20
WIND 20FT/LATE(MPH) E 18 E 20 E 18
MIXING HGT(FT-AGL/MSL)3570 3330
TRANSPORT WND (MPH) E 24 E 28
VENT RATE (KT-FT) 74970 79920
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-092000-
CULEBRA-
330 AM AST WED SEP 9 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 60 60 50
TEMP (24H TREND) 92 (+3) 79 (-3) 91
RH % (24H TREND) 59 (-8) 91 (+5) 64
WIND 20FT/EARLY(MPH) E 19 E 20 E 20
WIND 20FT/LATE(MPH) E 18 E 20 E 18
MIXING HGT(FT-AGL/MSL)3570 3360
TRANSPORT WND (MPH) E 24 E 28
VENT RATE (KT-FT) 74970 80640
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-092000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST WED SEP 9 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 30
TEMP (24H TREND) 92 (+1) 76 (-1) 90
RH % (24H TREND) 56 (-6) 94 (+8) 61
WIND 20FT/EARLY(MPH) E 21 G29 E 18 E 21
WIND 20FT/LATE(MPH) E 21 E 13 E 23
MIXING HGT(FT-AGL/MSL)5190 5240
TRANSPORT WND (MPH) E 24 E 25
VENT RATE (KT-FT) 108990 115280
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-092000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST WED SEP 9 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 60 60 40
TEMP (24H TREND) 90 (+2) 79 (-2) 89
RH % (24H TREND) 63 (-2) 94 (+6) 62
WIND 20FT/EARLY(MPH) E 21 E 20 E 20
WIND 20FT/LATE(MPH) E 19 E 20 E 19
MIXING HGT(FT-AGL/MSL)3480 3380
TRANSPORT WND (MPH) E 24 E 24
VENT RATE (KT-FT) 73080 70980
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-092000-
ST CROIX-
330 AM AST WED SEP 9 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 60 60 30
TEMP (24H TREND) 91 (+2) 78 (-3) 90
RH % (24H TREND) 64 (-2) 95 (+5) 64
WIND 20FT/EARLY(MPH) E 21 E 20 E 19
WIND 20FT/LATE(MPH) E 18 E 20 E 18
MIXING HGT(FT-AGL/MSL)4620 4620
TRANSPORT WND (MPH) E 28 E 25
VENT RATE (KT-FT) 110880 101640
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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